In person, yes. In an online debate? No.
In an online debate, when one provides someone with something that is behind a pay wall or without the ability to select a package, it has always struck me as though they're trying to make it so that no one can actually assess the validity of their source.
It just isn't realistic to expect someone to pay money, and then spend a week reading something, for an online forum debate that moves quickly, and everyone knows that. Besides that, unlike in person where you can either hand someone the book or read/copy certain passages to present in the debate, the other person have to actually pay for it, which might be prohibitive for them. Who asks someone to pay 10 bucks to be able to participate in an internet debate? Honestly. What other reason is there to do that besides being squirrely? Unless it's just a "hey, I liked this book, you should check it out"?
I think it's a bit disingenuous to give a tedious and for-pay source in an online debate, and I take it as a rather passive-aggressive gesture, personally.
I'm perfectly willing to use books. I used to use them all the time in debate in high school. But using books online, unless you've got some kind of copy of a passage to post, is just exclusionary.